Kendall County's population grew from 54,544 to 114,736 between 2000 and 2010, making it the fastest-growing county in the nation. Also: Hispanic growth, black flight and Chicago's polyglot population.

Business trips to Chicago can have a big impact on the revenue that flows into the local economy. Since 2003, travel volume has been unsteady, and trade shows and conventions at McCormick Place have plummeted.